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Greek–Serbian Alliance of 1913

The Greek–Serbian Alliance of 1913 was signed at Thessaloniki on 1 June 1913, in the aftermath of the First Balkan War, when both countries wanted to preserve their gains in Macedonia from Bulgarian expansionism. The treaty formed the cornerstone of Greek–Serbian relations for a decade, remaining in force through World War I until 1924.

Treaty of Peace, Friendship and Mutual Protection

1 June 1913

Thessaloniki, Kingdom of Greece (now Greece)

Background[edit]

During the First Balkan War, both Greek and Serbian armies concluded their operations in Macedonia by late 1912, while the Bulgarian army was directed mainly towards Thrace. As a result, the former succeeded in taking control of most of Macedonia, including its largest city, Thessaloniki, which was occupied by the Greek army in early November. Bulgaria nevertheless demanded most of Macedonia for herself, relying on the crucial role its army had played in facing the bulk of the Ottoman army in the First Balkan War, as well as on the pre-war agreements with Serbia regarding their mutual territorial claims in northern Macedonia. Both Greece, which had not signed any agreement on territorial partition, and Serbia, which in the London Conference of 1912–13 was forced by the Great Powers to cede its conquests in Albania in favour of the newly created Albanian Principality, opposed Bulgarian claims and insisted on an uti possidetis division of territory.

Impact and aftermath[edit]

The alliance played an important role in World War I, when Serbia was attacked by Austria. Venizelos mobilized the Greek army, but met with the refusal of the Germanophile King Constantine I to enter the war on the side of the Entente Powers. In an attempt to force the king's hand, in mid-1915 Venizelos allowed a British-French force to land in Thessaloniki in order to aid the Serbs, establishing the Salonica front. The crisis between Prime Minister and King over the issue of the country's participation in the war led to the National Schism, which plagued Greek political life until the 1930s. The Treaty of Alliance was finally unilaterally cancelled by the new Kingdom of the Serbs, Croats and Slovenes in 1924, as a reaction to the controversial Greek-Bulgarian Politis–Kalfov Protocol on minorities.

1912

Balkan League

Greek–Serbian Alliance of 1867

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"Greco-Serbian talks towards the conclusion of a treaty of alliance in May 1913 and the beginning of negotiations for the establishment of a Serbian Free Zone in Thessaloniki"

Svolopoulos, Konstantinos (1977). "Ο Β′ Βαλκανικός Πόλεμος" [The Second Balkan War]. In Christopoulos, Georgios A. & Bastias, Ioannis K. (eds.). Ιστορία του Ελληνικού Έθνους, Τόμος ΙΔ΄: Νεώτερος Ελληνισμός από το 1881 έως το 1913 [History of the Greek Nation, Volume XIV: Modern Hellenism from 1881 to 1913] (in Greek). Athens: Ekdotiki Athinon. pp. 335–351.  978-960-213-110-7.

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